diff --git a/.github/workflows/build.yaml b/.github/workflows/build.yaml
index 08bb3073..ec966a34 100644
--- a/.github/workflows/build.yaml
+++ b/.github/workflows/build.yaml
@@ -12,7 +12,7 @@ jobs:
     name: run tests from packaged source
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v5
         with:
           python-version: "3.12"
@@ -32,7 +32,7 @@ jobs:
     name: 'typing (mypy)'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v5
         with:
           python-version: "3.12"
@@ -57,7 +57,7 @@ jobs:
     name: "python=${{ matrix.python-version }} os=${{ matrix.os }}"
     runs-on: ${{ matrix.os }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v5
         with:
           python-version: ${{ matrix.python-version }}
diff --git a/.github/workflows/test-on-downstream-projects.yaml b/.github/workflows/test-on-downstream-projects.yaml
index 90880002..c3eed438 100644
--- a/.github/workflows/test-on-downstream-projects.yaml
+++ b/.github/workflows/test-on-downstream-projects.yaml
@@ -14,7 +14,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
       - uses: actions/setup-python@v5
         with:
           python-version: "3.x"